| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| James Hogan | 2186 | 63.44% | 66 | 72.53% |
| Sanjay Lal | 883 | 25.62% | 1 | 1.10% |
| Huacai Chen | 140 | 4.06% | 4 | 4.40% |
| Radim Krčmář | 59 | 1.71% | 1 | 1.10% |
| Thomas Bogendoerfer | 48 | 1.39% | 1 | 1.10% |
| Suraj Jitindar Singh | 23 | 0.67% | 1 | 1.10% |
| Christoffer Dall | 22 | 0.64% | 1 | 1.10% |
| Deng-Cheng Zhu | 18 | 0.52% | 2 | 2.20% |
| Paolo Bonzini | 18 | 0.52% | 5 | 5.49% |
| Xing Li | 15 | 0.44% | 2 | 2.20% |
| Christian Bornträger | 13 | 0.38% | 1 | 1.10% |
| Paul Burton | 8 | 0.23% | 2 | 2.20% |
| David Matlack | 6 | 0.17% | 1 | 1.10% |
| David Hildenbrand | 4 | 0.12% | 1 | 1.10% |
| Sean Christopherson | 3 | 0.09% | 2 | 2.20% |
| Total | 3446 | 91 |
/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. * Authors: Sanjay Lal <sanjayl@kymasys.com> */ #ifndef __MIPS_KVM_HOST_H__ #define __MIPS_KVM_HOST_H__ #include <linux/cpumask.h> #include <linux/mutex.h> #include <linux/hrtimer.h> #include <linux/interrupt.h> #include <linux/types.h> #include <linux/kvm.h> #include <linux/kvm_types.h> #include <linux/threads.h> #include <linux/spinlock.h> #include <asm/inst.h> #include <asm/mipsregs.h> #include <kvm/iodev.h> /* MIPS KVM register ids */ #define MIPS_CP0_32(_R, _S) \ (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S))) #define MIPS_CP0_64(_R, _S) \ (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U64 | (8 * (_R) + (_S))) #define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0) #define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0) #define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0) #define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0) #define KVM_REG_MIPS_CP0_CONTEXTCONFIG MIPS_CP0_32(4, 1) #define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2) #define KVM_REG_MIPS_CP0_XCONTEXTCONFIG MIPS_CP0_64(4, 3) #define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0) #define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1) #define KVM_REG_MIPS_CP0_SEGCTL0 MIPS_CP0_64(5, 2) #define KVM_REG_MIPS_CP0_SEGCTL1 MIPS_CP0_64(5, 3) #define KVM_REG_MIPS_CP0_SEGCTL2 MIPS_CP0_64(5, 4) #define KVM_REG_MIPS_CP0_PWBASE MIPS_CP0_64(5, 5) #define KVM_REG_MIPS_CP0_PWFIELD MIPS_CP0_64(5, 6) #define KVM_REG_MIPS_CP0_PWSIZE MIPS_CP0_64(5, 7) #define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0) #define KVM_REG_MIPS_CP0_PWCTL MIPS_CP0_32(6, 6) #define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0) #define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0) #define KVM_REG_MIPS_CP0_BADINSTR MIPS_CP0_32(8, 1) #define KVM_REG_MIPS_CP0_BADINSTRP MIPS_CP0_32(8, 2) #define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0) #define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0) #define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0) #define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0) #define KVM_REG_MIPS_CP0_INTCTL MIPS_CP0_32(12, 1) #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0) #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0) #define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0) #define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1) #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0) #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1) #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2) #define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3) #define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4) #define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5) #define KVM_REG_MIPS_CP0_CONFIG6 MIPS_CP0_32(16, 6) #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7) #define KVM_REG_MIPS_CP0_MAARI MIPS_CP0_64(17, 2) #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) #define KVM_REG_MIPS_CP0_DIAG MIPS_CP0_32(22, 0) #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) #define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2) #define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3) #define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4) #define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5) #define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6) #define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7) #define KVM_MAX_VCPUS 16 /* memory slots that does not exposed to userspace */ #define KVM_PRIVATE_MEM_SLOTS 0 #define KVM_HALT_POLL_NS_DEFAULT 500000 extern unsigned long GUESTID_MASK; extern unsigned long GUESTID_FIRST_VERSION; extern unsigned long GUESTID_VERSION_MASK; #define KVM_INVALID_ADDR 0xdeadbeef /* * EVA has overlapping user & kernel address spaces, so user VAs may be > * PAGE_OFFSET. For this reason we can't use the default KVM_HVA_ERR_BAD of * PAGE_OFFSET. */ #define KVM_HVA_ERR_BAD (-1UL) #define KVM_HVA_ERR_RO_BAD (-2UL) static inline bool kvm_is_error_hva(unsigned long addr) { return IS_ERR_VALUE(addr); } struct kvm_vm_stat { ulong remote_tlb_flush; }; struct kvm_vcpu_stat { u64 wait_exits; u64 cache_exits; u64 signal_exits; u64 int_exits; u64 cop_unusable_exits; u64 tlbmod_exits; u64 tlbmiss_ld_exits; u64 tlbmiss_st_exits; u64 addrerr_st_exits; u64 addrerr_ld_exits; u64 syscall_exits; u64 resvd_inst_exits; u64 break_inst_exits; u64 trap_inst_exits; u64 msa_fpe_exits; u64 fpe_exits; u64 msa_disabled_exits; u64 flush_dcache_exits; u64 vz_gpsi_exits; u64 vz_gsfc_exits; u64 vz_hc_exits; u64 vz_grr_exits; u64 vz_gva_exits; u64 vz_ghfc_exits; u64 vz_gpa_exits; u64 vz_resvd_exits; #ifdef CONFIG_CPU_LOONGSON64 u64 vz_cpucfg_exits; #endif u64 halt_successful_poll; u64 halt_attempted_poll; u64 halt_poll_success_ns; u64 halt_poll_fail_ns; u64 halt_poll_invalid; u64 halt_wakeup; }; struct kvm_arch_memory_slot { }; #ifdef CONFIG_CPU_LOONGSON64 struct ipi_state { uint32_t status; uint32_t en; uint32_t set; uint32_t clear; uint64_t buf[4]; }; struct loongson_kvm_ipi; struct ipi_io_device { int node_id; struct loongson_kvm_ipi *ipi; struct kvm_io_device device; }; struct loongson_kvm_ipi { spinlock_t lock; struct kvm *kvm; struct ipi_state ipistate[16]; struct ipi_io_device dev_ipi[4]; }; #endif struct kvm_arch { /* Guest physical mm */ struct mm_struct gpa_mm; /* Mask of CPUs needing GPA ASID flush */ cpumask_t asid_flush_mask; #ifdef CONFIG_CPU_LOONGSON64 struct loongson_kvm_ipi ipi; #endif }; #define N_MIPS_COPROC_REGS 32 #define N_MIPS_COPROC_SEL 8 struct mips_coproc { unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; #endif }; /* * Coprocessor 0 register names */ #define MIPS_CP0_TLB_INDEX 0 #define MIPS_CP0_TLB_RANDOM 1 #define MIPS_CP0_TLB_LOW 2 #define MIPS_CP0_TLB_LO0 2 #define MIPS_CP0_TLB_LO1 3 #define MIPS_CP0_TLB_CONTEXT 4 #define MIPS_CP0_TLB_PG_MASK 5 #define MIPS_CP0_TLB_WIRED 6 #define MIPS_CP0_HWRENA 7 #define MIPS_CP0_BAD_VADDR 8 #define MIPS_CP0_COUNT 9 #define MIPS_CP0_TLB_HI 10 #define MIPS_CP0_COMPARE 11 #define MIPS_CP0_STATUS 12 #define MIPS_CP0_CAUSE 13 #define MIPS_CP0_EXC_PC 14 #define MIPS_CP0_PRID 15 #define MIPS_CP0_CONFIG 16 #define MIPS_CP0_LLADDR 17 #define MIPS_CP0_WATCH_LO 18 #define MIPS_CP0_WATCH_HI 19 #define MIPS_CP0_TLB_XCONTEXT 20 #define MIPS_CP0_DIAG 22 #define MIPS_CP0_ECC 26 #define MIPS_CP0_CACHE_ERR 27 #define MIPS_CP0_TAG_LO 28 #define MIPS_CP0_TAG_HI 29 #define MIPS_CP0_ERROR_PC 30 #define MIPS_CP0_DEBUG 23 #define MIPS_CP0_DEPC 24 #define MIPS_CP0_PERFCNT 25 #define MIPS_CP0_ERRCTL 26 #define MIPS_CP0_DATA_LO 28 #define MIPS_CP0_DATA_HI 29 #define MIPS_CP0_DESAVE 31 #define MIPS_CP0_CONFIG_SEL 0 #define MIPS_CP0_CONFIG1_SEL 1 #define MIPS_CP0_CONFIG2_SEL 2 #define MIPS_CP0_CONFIG3_SEL 3 #define MIPS_CP0_CONFIG4_SEL 4 #define MIPS_CP0_CONFIG5_SEL 5 #define MIPS_CP0_GUESTCTL2 10 #define MIPS_CP0_GUESTCTL2_SEL 5 #define MIPS_CP0_GTOFFSET 12 #define MIPS_CP0_GTOFFSET_SEL 7 /* Resume Flags */ #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */ #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ #define RESUME_GUEST 0 #define RESUME_GUEST_DR RESUME_FLAG_DR #define RESUME_HOST RESUME_FLAG_HOST enum emulation_result { EMULATE_DONE, /* no further processing */ EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */ EMULATE_FAIL, /* can't emulate this instruction */ EMULATE_WAIT, /* WAIT instruction */ EMULATE_PRIV_FAIL, EMULATE_EXCEPT, /* A guest exception has been generated */ EMULATE_HYPERCALL, /* HYPCALL instruction */ }; #if defined(CONFIG_64BIT) #define VPN2_MASK GENMASK(cpu_vmbits - 1, 13) #else #define VPN2_MASK 0xffffe000 #endif #define KVM_ENTRYHI_ASID cpu_asid_mask(&boot_cpu_data) #define TLB_IS_GLOBAL(x) ((x).tlb_lo[0] & (x).tlb_lo[1] & ENTRYLO_G) #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) #define TLB_ASID(x) ((x).tlb_hi & KVM_ENTRYHI_ASID) #define TLB_LO_IDX(x, va) (((va) >> PAGE_SHIFT) & 1) #define TLB_IS_VALID(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_V) #define TLB_IS_DIRTY(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_D) #define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \ ((y) & VPN2_MASK & ~(x).tlb_mask)) #define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \ TLB_ASID(x) == ((y) & KVM_ENTRYHI_ASID)) struct kvm_mips_tlb { long tlb_mask; long tlb_hi; long tlb_lo[2]; }; #define KVM_MIPS_AUX_FPU 0x1 #define KVM_MIPS_AUX_MSA 0x2 struct kvm_vcpu_arch { void *guest_ebase; int (*vcpu_run)(struct kvm_vcpu *vcpu); /* Host registers preserved across guest mode execution */ unsigned long host_stack; unsigned long host_gp; unsigned long host_pgd; unsigned long host_entryhi; /* Host CP0 registers used when handling exits from guest */ unsigned long host_cp0_badvaddr; unsigned long host_cp0_epc; u32 host_cp0_cause; u32 host_cp0_guestctl0; u32 host_cp0_badinstr; u32 host_cp0_badinstrp; /* GPRS */ unsigned long gprs[32]; unsigned long hi; unsigned long lo; unsigned long pc; /* FPU State */ struct mips_fpu_struct fpu; /* Which auxiliary state is loaded (KVM_MIPS_AUX_*) */ unsigned int aux_inuse; /* COP0 State */ struct mips_coproc *cop0; /* Resume PC after MMIO completion */ unsigned long io_pc; /* GPR used as IO source/target */ u32 io_gpr; struct hrtimer comparecount_timer; /* Count timer control KVM register */ u32 count_ctl; /* Count bias from the raw time */ u32 count_bias; /* Frequency of timer in Hz */ u32 count_hz; /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */ s64 count_dyn_bias; /* Resume time */ ktime_t count_resume; /* Period of timer tick in ns */ u64 count_period; /* Bitmask of exceptions that are pending */ unsigned long pending_exceptions; /* Bitmask of pending exceptions to be cleared */ unsigned long pending_exceptions_clr; /* Cache some mmu pages needed inside spinlock regions */ struct kvm_mmu_memory_cache mmu_page_cache; /* vcpu's vzguestid is different on each host cpu in an smp system */ u32 vzguestid[NR_CPUS]; /* wired guest TLB entries */ struct kvm_mips_tlb *wired_tlb; unsigned int wired_tlb_limit; unsigned int wired_tlb_used; /* emulated guest MAAR registers */ unsigned long maar[6]; /* Last CPU the VCPU state was loaded on */ int last_sched_cpu; /* Last CPU the VCPU actually executed guest code on */ int last_exec_cpu; /* WAIT executed */ int wait; u8 fpu_enabled; u8 msa_enabled; }; static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, unsigned long val) { unsigned long temp; do { __asm__ __volatile__( " .set push \n" " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " or %0, %2 \n" " " __SC "%0, %1 \n" " .set pop \n" : "=&r" (temp), "+m" (*reg) : "r" (val)); } while (unlikely(!temp)); } static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg, unsigned long val) { unsigned long temp; do { __asm__ __volatile__( " .set push \n" " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " and %0, %2 \n" " " __SC "%0, %1 \n" " .set pop \n" : "=&r" (temp), "+m" (*reg) : "r" (~val)); } while (unlikely(!temp)); } static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, unsigned long change, unsigned long val) { unsigned long temp; do { __asm__ __volatile__( " .set push \n" " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " and %0, %2 \n" " or %0, %3 \n" " " __SC "%0, %1 \n" " .set pop \n" : "=&r" (temp), "+m" (*reg) : "r" (~change), "r" (val & change)); } while (unlikely(!temp)); } /* Guest register types, used in accessor build below */ #define __KVMT32 u32 #define __KVMTl unsigned long /* * __BUILD_KVM_$ops_SAVED(): kvm_$op_sw_gc0_$reg() * These operate on the saved guest C0 state in RAM. */ /* Generate saved context simple accessors */ #define __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ static inline __KVMT##type kvm_read_sw_gc0_##name(struct mips_coproc *cop0) \ { \ return cop0->reg[(_reg)][(sel)]; \ } \ static inline void kvm_write_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ cop0->reg[(_reg)][(sel)] = val; \ } /* Generate saved context bitwise modifiers */ #define __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ cop0->reg[(_reg)][(sel)] |= val; \ } \ static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ cop0->reg[(_reg)][(sel)] &= ~val; \ } \ static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type mask, \ __KVMT##type val) \ { \ unsigned long _mask = mask; \ cop0->reg[(_reg)][(sel)] &= ~_mask; \ cop0->reg[(_reg)][(sel)] |= val & _mask; \ } /* Generate saved context atomic bitwise modifiers */ #define __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \ static inline void kvm_set_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ _kvm_atomic_set_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \ } \ static inline void kvm_clear_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ _kvm_atomic_clear_c0_guest_reg(&cop0->reg[(_reg)][(sel)], val); \ } \ static inline void kvm_change_sw_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type mask, \ __KVMT##type val) \ { \ _kvm_atomic_change_c0_guest_reg(&cop0->reg[(_reg)][(sel)], mask, \ val); \ } /* * __BUILD_KVM_$ops_VZ(): kvm_$op_vz_gc0_$reg() * These operate on the VZ guest C0 context in hardware. */ /* Generate VZ guest context simple accessors */ #define __BUILD_KVM_RW_VZ(name, type, _reg, sel) \ static inline __KVMT##type kvm_read_vz_gc0_##name(struct mips_coproc *cop0) \ { \ return read_gc0_##name(); \ } \ static inline void kvm_write_vz_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ write_gc0_##name(val); \ } /* Generate VZ guest context bitwise modifiers */ #define __BUILD_KVM_SET_VZ(name, type, _reg, sel) \ static inline void kvm_set_vz_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ set_gc0_##name(val); \ } \ static inline void kvm_clear_vz_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ clear_gc0_##name(val); \ } \ static inline void kvm_change_vz_gc0_##name(struct mips_coproc *cop0, \ __KVMT##type mask, \ __KVMT##type val) \ { \ change_gc0_##name(mask, val); \ } /* Generate VZ guest context save/restore to/from saved context */ #define __BUILD_KVM_SAVE_VZ(name, _reg, sel) \ static inline void kvm_restore_gc0_##name(struct mips_coproc *cop0) \ { \ write_gc0_##name(cop0->reg[(_reg)][(sel)]); \ } \ static inline void kvm_save_gc0_##name(struct mips_coproc *cop0) \ { \ cop0->reg[(_reg)][(sel)] = read_gc0_##name(); \ } /* * __BUILD_KVM_$ops_WRAP(): kvm_$op_$name1() -> kvm_$op_$name2() * These wrap a set of operations to provide them with a different name. */ /* Generate simple accessor wrapper */ #define __BUILD_KVM_RW_WRAP(name1, name2, type) \ static inline __KVMT##type kvm_read_##name1(struct mips_coproc *cop0) \ { \ return kvm_read_##name2(cop0); \ } \ static inline void kvm_write_##name1(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ kvm_write_##name2(cop0, val); \ } /* Generate bitwise modifier wrapper */ #define __BUILD_KVM_SET_WRAP(name1, name2, type) \ static inline void kvm_set_##name1(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ kvm_set_##name2(cop0, val); \ } \ static inline void kvm_clear_##name1(struct mips_coproc *cop0, \ __KVMT##type val) \ { \ kvm_clear_##name2(cop0, val); \ } \ static inline void kvm_change_##name1(struct mips_coproc *cop0, \ __KVMT##type mask, \ __KVMT##type val) \ { \ kvm_change_##name2(cop0, mask, val); \ } /* * __BUILD_KVM_$ops_SW(): kvm_$op_c0_guest_$reg() -> kvm_$op_sw_gc0_$reg() * These generate accessors operating on the saved context in RAM, and wrap them * with the common guest C0 accessors (for use by common emulation code). */ #define __BUILD_KVM_RW_SW(name, type, _reg, sel) \ __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ __BUILD_KVM_RW_WRAP(c0_guest_##name, sw_gc0_##name, type) #define __BUILD_KVM_SET_SW(name, type, _reg, sel) \ __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type) #define __BUILD_KVM_ATOMIC_SW(name, type, _reg, sel) \ __BUILD_KVM_ATOMIC_SAVED(name, type, _reg, sel) \ __BUILD_KVM_SET_WRAP(c0_guest_##name, sw_gc0_##name, type) /* * VZ (hardware assisted virtualisation) * These macros use the active guest state in VZ mode (hardware registers), */ /* * __BUILD_KVM_$ops_HW(): kvm_$op_c0_guest_$reg() -> kvm_$op_vz_gc0_$reg() * These generate accessors operating on the VZ guest context in hardware, and * wrap them with the common guest C0 accessors (for use by common emulation * code). * * Accessors operating on the saved context in RAM are also generated to allow * convenient explicit saving and restoring of the state. */ #define __BUILD_KVM_RW_HW(name, type, _reg, sel) \ __BUILD_KVM_RW_SAVED(name, type, _reg, sel) \ __BUILD_KVM_RW_VZ(name, type, _reg, sel) \ __BUILD_KVM_RW_WRAP(c0_guest_##name, vz_gc0_##name, type) \ __BUILD_KVM_SAVE_VZ(name, _reg, sel) #define __BUILD_KVM_SET_HW(name, type, _reg, sel) \ __BUILD_KVM_SET_SAVED(name, type, _reg, sel) \ __BUILD_KVM_SET_VZ(name, type, _reg, sel) \ __BUILD_KVM_SET_WRAP(c0_guest_##name, vz_gc0_##name, type) /* * We can't do atomic modifications of COP0 state if hardware can modify it. * Races must be handled explicitly. */ #define __BUILD_KVM_ATOMIC_HW __BUILD_KVM_SET_HW /* * Define accessors for CP0 registers that are accessible to the guest. These * are primarily used by common emulation code, which may need to access the * registers differently depending on the implementation. * * fns_hw/sw name type reg num select */ __BUILD_KVM_RW_HW(index, 32, MIPS_CP0_TLB_INDEX, 0) __BUILD_KVM_RW_HW(entrylo0, l, MIPS_CP0_TLB_LO0, 0) __BUILD_KVM_RW_HW(entrylo1, l, MIPS_CP0_TLB_LO1, 0) __BUILD_KVM_RW_HW(context, l, MIPS_CP0_TLB_CONTEXT, 0) __BUILD_KVM_RW_HW(contextconfig, 32, MIPS_CP0_TLB_CONTEXT, 1) __BUILD_KVM_RW_HW(userlocal, l, MIPS_CP0_TLB_CONTEXT, 2) __BUILD_KVM_RW_HW(xcontextconfig, l, MIPS_CP0_TLB_CONTEXT, 3) __BUILD_KVM_RW_HW(pagemask, l, MIPS_CP0_TLB_PG_MASK, 0) __BUILD_KVM_RW_HW(pagegrain, 32, MIPS_CP0_TLB_PG_MASK, 1) __BUILD_KVM_RW_HW(segctl0, l, MIPS_CP0_TLB_PG_MASK, 2) __BUILD_KVM_RW_HW(segctl1, l, MIPS_CP0_TLB_PG_MASK, 3) __BUILD_KVM_RW_HW(segctl2, l, MIPS_CP0_TLB_PG_MASK, 4) __BUILD_KVM_RW_HW(pwbase, l, MIPS_CP0_TLB_PG_MASK, 5) __BUILD_KVM_RW_HW(pwfield, l, MIPS_CP0_TLB_PG_MASK, 6) __BUILD_KVM_RW_HW(pwsize, l, MIPS_CP0_TLB_PG_MASK, 7) __BUILD_KVM_RW_HW(wired, 32, MIPS_CP0_TLB_WIRED, 0) __BUILD_KVM_RW_HW(pwctl, 32, MIPS_CP0_TLB_WIRED, 6) __BUILD_KVM_RW_HW(hwrena, 32, MIPS_CP0_HWRENA, 0) __BUILD_KVM_RW_HW(badvaddr, l, MIPS_CP0_BAD_VADDR, 0) __BUILD_KVM_RW_HW(badinstr, 32, MIPS_CP0_BAD_VADDR, 1) __BUILD_KVM_RW_HW(badinstrp, 32, MIPS_CP0_BAD_VADDR, 2) __BUILD_KVM_RW_SW(count, 32, MIPS_CP0_COUNT, 0) __BUILD_KVM_RW_HW(entryhi, l, MIPS_CP0_TLB_HI, 0) __BUILD_KVM_RW_HW(compare, 32, MIPS_CP0_COMPARE, 0) __BUILD_KVM_RW_HW(status, 32, MIPS_CP0_STATUS, 0) __BUILD_KVM_RW_HW(intctl, 32, MIPS_CP0_STATUS, 1) __BUILD_KVM_RW_HW(cause, 32, MIPS_CP0_CAUSE, 0) __BUILD_KVM_RW_HW(epc, l, MIPS_CP0_EXC_PC, 0) __BUILD_KVM_RW_SW(prid, 32, MIPS_CP0_PRID, 0) __BUILD_KVM_RW_HW(ebase, l, MIPS_CP0_PRID, 1) __BUILD_KVM_RW_HW(config, 32, MIPS_CP0_CONFIG, 0) __BUILD_KVM_RW_HW(config1, 32, MIPS_CP0_CONFIG, 1) __BUILD_KVM_RW_HW(config2, 32, MIPS_CP0_CONFIG, 2) __BUILD_KVM_RW_HW(config3, 32, MIPS_CP0_CONFIG, 3) __BUILD_KVM_RW_HW(config4, 32, MIPS_CP0_CONFIG, 4) __BUILD_KVM_RW_HW(config5, 32, MIPS_CP0_CONFIG, 5) __BUILD_KVM_RW_HW(config6, 32, MIPS_CP0_CONFIG, 6) __BUILD_KVM_RW_HW(config7, 32, MIPS_CP0_CONFIG, 7) __BUILD_KVM_RW_SW(maari, l, MIPS_CP0_LLADDR, 2) __BUILD_KVM_RW_HW(xcontext, l, MIPS_CP0_TLB_XCONTEXT, 0) __BUILD_KVM_RW_HW(errorepc, l, MIPS_CP0_ERROR_PC, 0) __BUILD_KVM_RW_HW(kscratch1, l, MIPS_CP0_DESAVE, 2) __BUILD_KVM_RW_HW(kscratch2, l, MIPS_CP0_DESAVE, 3) __BUILD_KVM_RW_HW(kscratch3, l, MIPS_CP0_DESAVE, 4) __BUILD_KVM_RW_HW(kscratch4, l, MIPS_CP0_DESAVE, 5) __BUILD_KVM_RW_HW(kscratch5, l, MIPS_CP0_DESAVE, 6) __BUILD_KVM_RW_HW(kscratch6, l, MIPS_CP0_DESAVE, 7) /* Bitwise operations (on HW state) */ __BUILD_KVM_SET_HW(status, 32, MIPS_CP0_STATUS, 0) /* Cause can be modified asynchronously from hardirq hrtimer callback */ __BUILD_KVM_ATOMIC_HW(cause, 32, MIPS_CP0_CAUSE, 0) __BUILD_KVM_SET_HW(ebase, l, MIPS_CP0_PRID, 1) /* Bitwise operations (on saved state) */ __BUILD_KVM_SET_SAVED(config, 32, MIPS_CP0_CONFIG, 0) __BUILD_KVM_SET_SAVED(config1, 32, MIPS_CP0_CONFIG, 1) __BUILD_KVM_SET_SAVED(config2, 32, MIPS_CP0_CONFIG, 2) __BUILD_KVM_SET_SAVED(config3, 32, MIPS_CP0_CONFIG, 3) __BUILD_KVM_SET_SAVED(config4, 32, MIPS_CP0_CONFIG, 4) __BUILD_KVM_SET_SAVED(config5, 32, MIPS_CP0_CONFIG, 5) /* Helpers */ static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu) { return (!__builtin_constant_p(raw_cpu_has_fpu) || raw_cpu_has_fpu) && vcpu->fpu_enabled; } static inline bool kvm_mips_guest_has_fpu(struct kvm_vcpu_arch *vcpu) { return kvm_mips_guest_can_have_fpu(vcpu) && kvm_read_c0_guest_config1(vcpu->cop0) & MIPS_CONF1_FP; } static inline bool kvm_mips_guest_can_have_msa(struct kvm_vcpu_arch *vcpu) { return (!__builtin_constant_p(cpu_has_msa) || cpu_has_msa) && vcpu->msa_enabled; } static inline bool kvm_mips_guest_has_msa(struct kvm_vcpu_arch *vcpu) { return kvm_mips_guest_can_have_msa(vcpu) && kvm_read_c0_guest_config3(vcpu->cop0) & MIPS_CONF3_MSA; } struct kvm_mips_callbacks { int (*handle_cop_unusable)(struct kvm_vcpu *vcpu); int (*handle_tlb_mod)(struct kvm_vcpu *vcpu); int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu); int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu); int (*handle_addr_err_st)(struct kvm_vcpu *vcpu); int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu); int (*handle_syscall)(struct kvm_vcpu *vcpu); int (*handle_res_inst)(struct kvm_vcpu *vcpu); int (*handle_break)(struct kvm_vcpu *vcpu); int (*handle_trap)(struct kvm_vcpu *vcpu); int (*handle_msa_fpe)(struct kvm_vcpu *vcpu); int (*handle_fpe)(struct kvm_vcpu *vcpu); int (*handle_msa_disabled)(struct kvm_vcpu *vcpu); int (*handle_guest_exit)(struct kvm_vcpu *vcpu); int (*hardware_enable)(void); void (*hardware_disable)(void); int (*check_extension)(struct kvm *kvm, long ext); int (*vcpu_init)(struct kvm_vcpu *vcpu); void (*vcpu_uninit)(struct kvm_vcpu *vcpu); int (*vcpu_setup)(struct kvm_vcpu *vcpu); void (*prepare_flush_shadow)(struct kvm *kvm); gpa_t (*gva_to_gpa)(gva_t gva); void (*queue_timer_int)(struct kvm_vcpu *vcpu); void (*dequeue_timer_int)(struct kvm_vcpu *vcpu); void (*queue_io_int)(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq); void (*dequeue_io_int)(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq); int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority, u32 cause); int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority, u32 cause); unsigned long (*num_regs)(struct kvm_vcpu *vcpu); int (*copy_reg_indices)(struct kvm_vcpu *vcpu, u64 __user *indices); int (*get_one_reg)(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg, s64 *v); int (*set_one_reg)(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg, s64 v); int (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); int (*vcpu_put)(struct kvm_vcpu *vcpu, int cpu); int (*vcpu_run)(struct kvm_vcpu *vcpu); void (*vcpu_reenter)(struct kvm_vcpu *vcpu); }; extern struct kvm_mips_callbacks *kvm_mips_callbacks; int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks); /* Debug: dump vcpu state */ int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); extern int kvm_mips_handle_exit(struct kvm_vcpu *vcpu); /* Building of entry/exception code */ int kvm_mips_entry_setup(void); void *kvm_mips_build_vcpu_run(void *addr); void *kvm_mips_build_tlb_refill_exception(void *addr, void *handler); void *kvm_mips_build_exception(void *addr, void *handler); void *kvm_mips_build_exit(void *addr); /* FPU/MSA context management */ void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu); void __kvm_restore_fpu(struct kvm_vcpu_arch *vcpu); void __kvm_restore_fcsr(struct kvm_vcpu_arch *vcpu); void __kvm_save_msa(struct kvm_vcpu_arch *vcpu); void __kvm_restore_msa(struct kvm_vcpu_arch *vcpu); void __kvm_restore_msa_upper(struct kvm_vcpu_arch *vcpu); void __kvm_restore_msacsr(struct kvm_vcpu_arch *vcpu); void kvm_own_fpu(struct kvm_vcpu *vcpu); void kvm_own_msa(struct kvm_vcpu *vcpu); void kvm_drop_fpu(struct kvm_vcpu *vcpu); void kvm_lose_fpu(struct kvm_vcpu *vcpu); /* TLB handling */ int kvm_mips_handle_vz_root_tlb_fault(unsigned long badvaddr, struct kvm_vcpu *vcpu, bool write_fault); int kvm_vz_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); int kvm_vz_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long gva, unsigned long *gpa); void kvm_vz_local_flush_roottlb_all_guests(void); void kvm_vz_local_flush_guesttlb_all(void); void kvm_vz_save_guesttlb(struct kvm_mips_tlb *buf, unsigned int index, unsigned int count); void kvm_vz_load_guesttlb(const struct kvm_mips_tlb *buf, unsigned int index, unsigned int count); #ifdef CONFIG_CPU_LOONGSON64 void kvm_loongson_clear_guest_vtlb(void); void kvm_loongson_clear_guest_ftlb(void); #endif /* MMU handling */ bool kvm_mips_flush_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn); int kvm_mips_mkclean_gpa_pt(struct kvm *kvm, gfn_t start_gfn, gfn_t end_gfn); pgd_t *kvm_pgd_alloc(void); void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu); #define KVM_ARCH_WANT_MMU_NOTIFIER /* Emulation */ enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause); int kvm_get_badinstr(u32 *opc, struct kvm_vcpu *vcpu, u32 *out); int kvm_get_badinstrp(u32 *opc, struct kvm_vcpu *vcpu, u32 *out); /** * kvm_is_ifetch_fault() - Find whether a TLBL exception is due to ifetch fault. * @vcpu: Virtual CPU. * * Returns: Whether the TLBL exception was likely due to an instruction * fetch fault rather than a data load fault. */ static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *vcpu) { unsigned long badvaddr = vcpu->host_cp0_badvaddr; unsigned long epc = msk_isa16_mode(vcpu->pc); u32 cause = vcpu->host_cp0_cause; if (epc == badvaddr) return true; /* * Branches may be 32-bit or 16-bit instructions. * This isn't exact, but we don't really support MIPS16 or microMIPS yet * in KVM anyway. */ if ((cause & CAUSEF_BD) && badvaddr - epc <= 4) return true; return false; } extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu); u32 kvm_mips_read_count(struct kvm_vcpu *vcpu); void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count); void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack); void kvm_mips_init_count(struct kvm_vcpu *vcpu, unsigned long count_hz); int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl); int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume); int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz); void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu); void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu); enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu); /* fairly internal functions requiring some care to use */ int kvm_mips_count_disabled(struct kvm_vcpu *vcpu); ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, u32 *count); int kvm_mips_restore_hrtimer(struct kvm_vcpu *vcpu, ktime_t before, u32 count, int min_drift); void kvm_vz_acquire_htimer(struct kvm_vcpu *vcpu); void kvm_vz_lose_htimer(struct kvm_vcpu *vcpu); enum emulation_result kvm_mips_emulate_store(union mips_instruction inst, u32 cause, struct kvm_vcpu *vcpu); enum emulation_result kvm_mips_emulate_load(union mips_instruction inst, u32 cause, struct kvm_vcpu *vcpu); /* COP0 */ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu); /* Hypercalls (hypcall.c) */ enum emulation_result kvm_mips_emul_hypcall(struct kvm_vcpu *vcpu, union mips_instruction inst); int kvm_mips_handle_hypcall(struct kvm_vcpu *vcpu); /* Misc */ extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu); extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm); extern int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq); static inline void kvm_arch_hardware_unsetup(void) {} static inline void kvm_arch_sync_events(struct kvm *kvm) {} static inline void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot) {} static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {} static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {} #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLB int kvm_arch_flush_remote_tlb(struct kvm *kvm); #endif /* __MIPS_KVM_HOST_H__ */
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